/**
 * #      852
 * 名称   山脉数组的峰顶索引
 * 链接   https://leetcode-cn.com/problems/peak-index-in-a-mountain-array
 * 题解   [295](https://leetcode-cn.com/problems/peak-index-in-a-mountain-array/solution)
 * 通过率 70.3%
 * 难道   简单
 */

